You must download all three parts

You must download all three parts, which will be:

*.exe

*.r00

*.r01

After downloading, put all three files in the same folder and run the *.exe file - it will automatically connect to the other files it needs.

Personal Copy v5r2

DOWNLOAD pc51dm.exe (8,750k)

Unison v1.0

DOWNLOAD Unison.exe (6,202k)